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WO2023087515A1 - Appareil et procédé de traitement de gaz combustible - Google Patents

Appareil et procédé de traitement de gaz combustible Download PDF

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Publication number
WO2023087515A1
WO2023087515A1 PCT/CN2022/070061 CN2022070061W WO2023087515A1 WO 2023087515 A1 WO2023087515 A1 WO 2023087515A1 CN 2022070061 W CN2022070061 W CN 2022070061W WO 2023087515 A1 WO2023087515 A1 WO 2023087515A1
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WIPO (PCT)
Prior art keywords
gas
liquid
concentration
membrane separator
combustible gas
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PCT/CN2022/070061
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English (en)
Chinese (zh)
Inventor
陈宏宇
陈先树
崔启利
孙晓辉
王云博
盖竹兴
Original Assignee
烟台杰瑞石油装备技术有限公司
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Publication of WO2023087515A1 publication Critical patent/WO2023087515A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/228—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion characterised by specific membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
    • B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/30—Controlling by gas-analysis apparatus

Definitions

  • Embodiments of the present disclosure relate to a combustible gas processing device and a combustible gas processing method.
  • combustible gas such as hydrocarbon gas leaks
  • the combustible gas When combustible gas such as hydrocarbon gas leaks, the combustible gas will mix with air to form a mixed gas.
  • the volume fraction of combustible gas in the mixed gas reaches the limit state of explosion, it will explode when encountering static electricity or open flame. If these mixed gases are not disposed of, they will flow and spread everywhere with the natural wind or the ground, causing great danger to the surrounding environment.
  • the current conventional solution is to use natural wind or fire water mist to dilute and disperse to reduce the concentration of combustible gas and reduce the risk of explosion.
  • a combustible gas treatment device including: a condenser, including a condenser inlet and a condenser outlet; a gas-liquid separator, including a gas-liquid separator inlet, a gas-liquid separator liquid outlet, and a gas-liquid separator a separator gas outlet; a liquid treatment section configured to process liquid entering the liquid treatment section; a membrane separator including a membrane separator inlet, a first membrane separator outlet, and a second membrane separator outlet; waste gas treatment part, configured to process the gas entering the exhaust gas treatment part; a first concentration analyzer, connected between the outlet of the first membrane separator and the inlet of the condenser, and configured to analyze the The combustible gas concentration in the gas at the outlet of the first membrane separator is measured; the first controller is connected with the first concentration analyzer, wherein the outlet of the condenser is connected with the inlet of the gas-liquid separator, and the The liquid outlet
  • the outlet of the second membrane separator is connected to the exhaust gas treatment part, and the first controller is configured to determine that the membrane separator is activated when the combustible gas concentration detected by the first concentration analyzer is greater than or equal to the first concentration threshold It works normally and makes the gas discharged from the outlet of the first membrane separator flow into the condenser; when the combustible gas concentration detected by the first concentration analyzer is less than the first concentration threshold, it is determined that the membrane separation The controller works abnormally and handles the fault.
  • the membrane separator includes a gas filter membrane, the outlet of the first membrane separator and the outlet of the second membrane separator are respectively located on both sides of the filter membrane, and the first membrane separator The outlet is located on the side where the combustible gas is enriched.
  • the liquid treatment part includes a pump circuit and a gasification burner connected in sequence, the gasification burner is connected to the liquid outlet of the gas-liquid separator through the pump circuit, and the gasification burner is It is configured to vaporize and combust the inflowing liquid, and discharge the combusted gas to the outside.
  • the waste gas treatment unit includes an adsorption box and a fan sequentially connected from the outlet of the second membrane separator, and a vacuum pump connected to the adsorption box, and the vacuum pump is also connected to the inlet of the condenser, And it is configured to suck the gas adsorbed by the adsorption box and deliver it to the condenser.
  • the combustible gas treatment device further includes a liquid storage tank located between the liquid outlet of the gas-liquid separator and the liquid treatment part, configured to store the liquid separated by the gas-liquid separator.
  • the combustible gas treatment device further includes a second concentration analyzer located between the outlet of the second membrane separator and the exhaust gas treatment part, and is configured to analyze the The concentration of combustible gas is measured.
  • the combustible gas treatment device further includes a third concentration analyzer located between the adsorption box and the blower, and configured to measure the combustible gas concentration in the gas discharged from the adsorption box.
  • the combustible gas processing device further includes a liquid level gauge located in the liquid storage tank, and the liquid level gauge is configured to detect a liquid volume state of the liquid storage tank.
  • the combustible gas processing device further includes a second controller, connected to the second concentration analyzer, and configured to, when the combustible gas concentration detected by the second concentration analyzer is greater than or equal to the second concentration threshold , it is determined that the membrane separator is working abnormally and troubleshooting is performed; when the combustible gas concentration detected by the second concentration analyzer is less than the second concentration threshold, it is determined that the membrane separator is working normally and the The gas discharged from the outlet of the second membrane separator flows into the exhaust gas treatment part.
  • a second controller connected to the second concentration analyzer, and configured to, when the combustible gas concentration detected by the second concentration analyzer is greater than or equal to the second concentration threshold , it is determined that the membrane separator is working abnormally and troubleshooting is performed; when the combustible gas concentration detected by the second concentration analyzer is less than the second concentration threshold, it is determined that the membrane separator is working normally and the The gas discharged from the outlet of the second membrane separator flows into the exhaust
  • the combustible gas processing device further includes a third controller connected to the third concentration analyzer and configured to: when the combustible gas concentration detected by the third concentration analyzer is less than a third concentration threshold, It is determined that the adsorption box is working normally and the gas discharged from the adsorption box enters the fan; when the combustible gas concentration detected by the third concentration analyzer is greater than or equal to the third concentration threshold, it is determined that the adsorption The box is working abnormally and handle the fault.
  • a third controller connected to the third concentration analyzer and configured to: when the combustible gas concentration detected by the third concentration analyzer is less than a third concentration threshold, It is determined that the adsorption box is working normally and the gas discharged from the adsorption box enters the fan; when the combustible gas concentration detected by the third concentration analyzer is greater than or equal to the third concentration threshold, it is determined that the adsorption The box is working abnormally and handle the fault.
  • the combustible gas processing device further includes a fourth controller connected to the liquid level gauge and configured to be greater than a predetermined ratio of the liquid volume detected by the liquid level gauge to the total volume of the liquid storage tank When proportional, start the pump circuit to deliver the liquid in the liquid storage tank to the gasification burner for gasification combustion.
  • a combustible gas treatment method using the above-mentioned combustible gas treatment device including: introducing the collected combustible gas mixture gas into the condenser through the condenser inlet; passing through the condenser The condensed gas is introduced into the gas-liquid separator through the inlet of the gas-liquid separator for gas-liquid separation; the liquid obtained after gas-liquid separation is introduced into the liquid processing part for processing, and the gas obtained after gas-liquid separation is passed through The inlet of the membrane separator is introduced into the membrane separator for processing; the gas introduced into the membrane separator is divided into a first part and a second part after being processed by the membrane separator, and the combustible gas content of the first part is greater than that of the The gas content of the second part, the first part enters the condenser through the outlet of the first membrane separator, and the second part enters the exhaust gas treatment part through the outlet of the second membrane separator for treatment,
  • the combustible gas concentration detection is performed on the second part divided after being processed by the membrane separator to obtain a second concentration value, and when the second concentration value is greater than or equal to a second concentration threshold, Determine that the membrane separator is working abnormally and perform fault handling; when the second concentration value is less than the second concentration threshold, determine that the membrane separator is working normally and make the Gas flows into the exhaust gas treatment part.
  • the waste gas treatment part processing the introduced gas includes: adsorbing the gas entering the waste gas treatment part through an adsorption box to adsorb at least part of the combustible gas, and discharging the unadsorbed gas; The adsorbed gas is sucked out by a vacuum pump and introduced into the condenser for circulation.
  • the combustible gas treatment method further includes: detecting the combustible gas concentration of the unadsorbed gas discharged from the adsorption box to obtain a third concentration value, when the third concentration value is less than a third concentration threshold , it is determined that the adsorption box is working normally and the gas discharged from the adsorption box is discharged to the outside; when the third concentration value is greater than or equal to the third concentration threshold value, it is determined that the adsorption box is working abnormally and a fault occurs deal with.
  • processing the liquid introduced into the liquid processing unit includes: introducing the liquid into a gasification burner through a pump circuit to gasify and burn the liquid, and the gas generated after combustion is discharged to the outside.
  • the combustible gas processing method further includes storing the liquid in a liquid storage tank before introducing the liquid into the liquid part; detecting the liquid volume state of the liquid storage tank, when the liquid When the ratio of the volume to the total volume of the liquid storage tank is greater than a predetermined ratio, the pump circuit is activated to deliver the liquid in the liquid storage tank to the gasification burner for gasification combustion.
  • the mixed gas of combustible gas and air can be separated and processed separately through gas-liquid two-phase conversion, and the processing process can be safely and effectively carried out through the concentration detection feedback information.
  • FIG. 1 is a block diagram of a combustible gas treatment device according to some embodiments of the present disclosure
  • Fig. 2 is a block diagram of a combustible gas treatment device according to other embodiments of the present disclosure
  • Fig. 3 is a schematic diagram of different connections between a concentration meter and a controller in a combustible gas processing device according to some embodiments of the present disclosure
  • FIG. 4 is a flowchart of a combustible gas treatment method according to some embodiments of the present disclosure.
  • a combustible gas processing device including: a condenser, including a condenser inlet and a condenser outlet; a gas-liquid separator, including a gas-liquid separator inlet, a gas-liquid separator liquid outlet, and a gas-liquid separator The gas outlet of the device; the liquid treatment part is configured to process the liquid entering the liquid treatment part; the membrane separator includes a membrane separator inlet, a first membrane separator outlet and a second membrane separator outlet; an exhaust gas treatment part , configured to process the gas entering the gas treatment; a first concentration analyzer, connected between the outlet of the first membrane separator and the inlet of the condenser, and configured to analyze the gas from the first The combustible gas concentration in the gas at the outlet of the membrane separator is measured; the first controller is connected to the first concentration analyzer, wherein the outlet of the condenser is connected to the inlet of the gas-liquid separator, and the gas-
  • the outlet of the separator is connected to the exhaust gas treatment part, and the first controller is configured to determine that the membrane separator is working normally when the combustible gas concentration detected by the first concentration analyzer is greater than or equal to a first concentration threshold And make the gas discharged from the outlet of the first membrane separator flow into the condenser; when the combustible gas concentration detected by the first concentration analyzer is less than the first concentration threshold, it is determined that the membrane separator is working Exception and fault handling.
  • the combustible gas processing device can separate the combustible gas and air through gas-liquid two-phase conversion and process them separately, and ensure the safe and effective processing process through the concentration detection feedback information.
  • FIG. 1 is a block diagram of a combustible gas treatment device according to some embodiments of the present disclosure.
  • the combustible gas treatment device includes a condenser, a gas-liquid separator, a membrane separator, a liquid treatment part, an exhaust gas treatment part, a first concentration analyzer and a first controller (see Figure 3).
  • the condenser includes a condenser inlet and a condenser outlet.
  • the gas-liquid separator includes a gas-liquid separator inlet, a gas-liquid separator liquid outlet and a gas-liquid separator gas outlet.
  • the membrane separator includes a membrane separator inlet, a first membrane separator outlet and a second membrane separator outlet.
  • the liquid treatment section is configured to treat liquid entering said liquid treatment section.
  • the waste gas treatment unit is configured to treat the gas entering the gas treatment.
  • a first concentration analyzer is connected between the outlet of the first membrane separator and the inlet of the condenser, and is configured to measure the combustible gas concentration in the gas from the outlet of the first membrane separator.
  • the first controller is connected with the first concentration analyzer.
  • the inlets and outlets of each component in the figure are not shown in detail, but the flow direction of gas or liquid is shown in Figure 1, and when gas or liquid flows into a certain component, it includes an inlet at the corresponding position, gas or liquid Flow out of a component includes an outlet at the corresponding location.
  • Certain components include multiple inlets and/or multiple outlets, which are not particularly limited according to embodiments of the present disclosure.
  • the liquid inlet is the liquid inlet, and the liquid outlet is the liquid outlet;
  • the gas inlet is the gas inlet, and the gas outlet is the gas outlet, and no gas Or the inlet or outlet defined by the liquid, the meaning can also be determined without doubt according to the description in the context.
  • the outlet of the condenser is connected to the inlet of the gas-liquid separator
  • the liquid outlet of the gas-liquid separator is connected to the liquid treatment part
  • the gas outlet of the gas-liquid separator is connected to the inlet of the membrane separator
  • the outlet of the first membrane separator is connected to The inlet of the condenser and the outlet of the second membrane separator. Therefore, as shown in FIG.
  • the combustible gas processing device can realize liquid processing branches in the condenser, gas-liquid separator, and liquid processing part; in the condenser, gas-liquid separator, membrane separator, and The waste gas treatment branch is realized in the waste gas treatment part; while the gas circulation treatment branch can also be realized in the condenser, gas-liquid separator and membrane separator. Therefore, the combustible gas processing device according to the embodiments of the present disclosure can simultaneously process the mixed gas containing combustible gas from both gas and liquid phases, and process the gas in a cycle, thereby improving the efficiency of combustible gas processing.
  • the specific combustible gas treatment process will be described in more detail later with reference to the embodiments of the combustible gas treatment method.
  • the condenser has the function of low-temperature refrigeration.
  • the combustible gas When the gas enters the condenser, under the action of low temperature, the combustible gas will condense into a liquid state when it reaches a temperature below the boiling point, realizing the transformation from gas phase to liquid phase.
  • the power form of the condenser may be electric drive or hydraulic drive, but the embodiments according to the present disclosure are not limited thereto.
  • the gas-liquid separator can separate the liquid condensed from the condenser from the gaseous combustible gas, the liquid is discharged through the liquid outlet of the gas-liquid separator, and the gas is discharged through the gas outlet of the gas-liquid separator.
  • the gas-liquid separator may adopt any suitable structure, which is not particularly limited according to the embodiments of the present disclosure, so details will not be repeated here.
  • the combustible gas processing device may further include a first controller connected to the first concentration analyzer.
  • the first controller is configured to determine that the membrane separator is working normally and make the gas discharged from the outlet of the first membrane separator flow into the condenser when the combustible gas concentration detected by the first concentration analyzer is greater than or equal to the first concentration threshold; When the combustible gas concentration detected by the first concentration analyzer is lower than the first concentration threshold, it is determined that the membrane separator is working abnormally and troubleshooting is performed.
  • the uncondensed gas While the liquid separated by the gas-liquid separator is being processed, the uncondensed gas enters the membrane separator, and the membrane separator can separate and enrich the remaining mixed gas, most of which are enriched by combustible gas and recycled to condensation In the reactor (as shown in the path D in Figure 1), a small part of the gas is taken away by the air. These gases have a low concentration and cannot reach the explosion limit of combustible gases, but they need to be treated afterward before they can be discharged to the outside.
  • the embodiment of the present disclosure detects the concentration of combustible gas enriched through the membrane separator, if it is greater than or equal to the first concentration threshold, the membrane separator is working normally, and the concentration at the outlet of the first membrane separator is relatively high at this time
  • the combustible gas at the outlet of the second membrane separator has a lower concentration, which ensures the safety of subsequent entry into the exhaust gas treatment unit, and the gas flowing out of the outlet of the first membrane separator can flow into the condenser for recycling treatment. If the measured concentration is less than the first concentration threshold, the membrane separator is working abnormally.
  • the fault handling here can include one or several of the following processing methods: start the fault finding work to find the source of the fault; issue an alarm message; notify the operator; and shut down for maintenance.
  • the way to find the fault source may include automatic search by machine or search by personnel.
  • the type of alarm information issued is not limited to a specific form, and an alarm sound may be issued, a screen display may be performed, or other alarm methods may be used.
  • the way of notifying the operator may include automatically dialing a phone call or sending a short message to the operator.
  • the entire cycle processing can be shut down. Therefore, the combustible gas device according to the embodiments of the present disclosure can, on the basis of efficiently treating combustible gas, ensure that the processing process is carried out safely and effectively through concentration detection feedback information.
  • the selection of the first concentration threshold may be affected by various factors.
  • the first concentration threshold may be based on the collected combustible gas type, the original collected combustible gas concentration, the collection speed, and the like. Therefore, the first concentration threshold can be set according to actual conditions.
  • the membrane separator includes a gas filter membrane, and the outlet of the first membrane separator and the outlet of the second membrane separator are respectively located on both sides of the filter membrane. side. Since the molecular size of combustible gases such as hydrocarbon combustible gases is different from that of gases in the air, the mixture of combustible gases and air can be separated by selecting a gas filter membrane with a suitable pore size, and the combustible gas can be enriched on the side of the filter membrane. Gas, while there is no combustible gas or the concentration of combustible gas is reduced on the other side of the filter membrane. As for the selection of the filter membrane, any suitable gas filter membrane can be selected, and the embodiments of the present disclosure are not particularly limited, so details will not be repeated here.
  • Fig. 2 is a block diagram of a combustible gas treatment device according to other embodiments of the present disclosure.
  • the combustible gas treatment device shown in Figure 2 gives an example of the composition of the liquid treatment part (the part surrounded by the dotted rectangular frame at the top) and an example of the composition of the exhaust gas treatment part (the lower part The part enclosed by the dotted rectangular box).
  • the combustible gas treatment device shown in Fig. 2 also includes a liquid storage tank located between the gas-liquid separator and the liquid treatment part, a liquid level gauge located in the liquid storage tank, and a second membrane separator located at the outlet of the second membrane separator. A concentration analyzer and a third concentration analyzer located between the adsorption box and the blower.
  • the liquid processing part includes a pump circuit and a gasification burner connected in sequence, and the gasification burner is connected with the liquid outlet of the gas-liquid separator through the pump circuit.
  • the gasification burner is configured to gasify and combust the inflowing liquid, and discharge the combusted gas to the outside (for example, into the atmosphere).
  • a pump circuit can transfer liquid from a liquid storage tank to a gasification burner.
  • the liquid combustible gas is transformed into a gaseous state after reaching the gasification burner, realizing the phase change from liquid to gas.
  • the ignition switch is turned on, the combustible gas can be safely ignited to produce carbon dioxide and water, which are discharged into the atmosphere.
  • the exhaust gas treatment section includes an adsorption box and a fan connected in sequence from the outlet of the second membrane separator, and a vacuum pump connected to the adsorption box.
  • the vacuum pump is also connected to the condenser inlet, and is configured to suck the gas adsorbed by the adsorption box and deliver it to the condenser.
  • the adsorption box is mainly composed of activated carbon material.
  • combustible gas molecules such as hydrocarbon gas molecules
  • the fan is the power source for the adsorption box to realize the adsorption of combustible gas molecules by the activated carbon.
  • the gas discharged from the outlet of the second membrane separator can flow and pass through the adsorption box.
  • the fan discharges the gas discharged from the adsorption box to the outside (for example, the atmosphere).
  • the adsorption box has a limited amount of activated carbon and thus a limited ability to adsorb combustible gases.
  • the adsorption box When the adsorption box has been adsorbed for a period of time, it no longer has the adsorption capacity. At this time, the fan can be turned off, the vacuum pump can be started, and the molecules of the combustible gas adsorbed in the adsorption box can be desorbed by means of pressure swing desorption, and transported to the condenser through the pipeline G, so that it enters the gas-liquid two-phase cycle again process of transformation.
  • the second concentration analyzer is located between the outlet of the second membrane separator and the exhaust gas treatment part, and is configured to measure the combustible gas concentration in the gas from the outlet of the second membrane separator.
  • the combustible gas treatment device may further include a second controller connected to the second concentration analyzer.
  • the second controller is configured to determine that the membrane separator is working abnormally and perform troubleshooting when the combustible gas concentration detected by the second concentration analyzer is greater than or equal to the second concentration threshold; When the detected combustible gas concentration is less than the second concentration threshold, it is determined that the membrane separator works normally and the gas discharged from the outlet of the second membrane separator flows into the exhaust gas treatment part.
  • the fault handling here is the same as or similar to the fault handling described above, and will not be repeated here.
  • the outlet of the second membrane separator is located on the opposite side of the gas-filtering membrane, which is rich in combustible gas, so when the second membrane separator works normally, the combustible gas concentration at the outlet of the second membrane separator Should be relatively low.
  • the second concentration threshold is lower than the explosion limit value of the collected combustible gas, so as to ensure that the waste gas treatment part can safely process this part of the gas.
  • the second density threshold is smaller than the above-mentioned first density threshold.
  • the third concentration analyzer is located between the adsorption box and the fan, and is configured to measure the combustible gas concentration in the gas discharged from the adsorption box.
  • the combustible gas treatment device may further include a third controller connected to the third concentration analyzer.
  • the third controller is configured to, when the combustible gas concentration detected by the third concentration analyzer is less than the third concentration threshold, determine that the adsorption box is working normally and make the gas discharged from the adsorption box enter the fan; when the combustible gas detected by the third concentration analyzer When the gas concentration is greater than or equal to the third concentration threshold, it is determined that the adsorption box is working abnormally and troubleshooting is performed.
  • the fault handling here is the same as or similar to the fault handling described above, and will not be repeated here.
  • the concentration of combustible gas measured by the third concentration analyzer is extremely low; when the adsorption capacity is insufficient, the concentration of the third concentration analyzer will increase significantly.
  • the third density threshold is smaller than the above-mentioned second density threshold.
  • the liquid storage tank is located between the liquid outlet of the gas-liquid separator and the liquid treatment part. After passing through the gas-liquid separator, the liquid combustible gas is collected by the liquid storage tank.
  • the liquid storage tank has the function of maintaining low temperature.
  • the liquid combustible gas enters and is stored.
  • the volume capacity or volume status of the liquid tank can be monitored through the liquid level gauge.
  • the production rate of liquid combustible gas during gas processing may be lower than the processing rate of liquid combustible gas in the subsequent liquid processing unit. Therefore, the liquid is temporarily stored in the liquid storage tank, and the subsequent liquid processing unit is started after a certain amount is reached. It can ensure that all parts cooperate efficiently for processing.
  • the liquid level gauge can measure the volume capacity or volume state of the liquid storage tank. When the liquid volume ratio (the ratio of the volume of the stored liquid to the total volume of the liquid storage tank) exceeds 85%, the liquid level gauge will transmit the liquid level signal to subsequent devices.
  • the liquid volume ratio the ratio of the volume of the stored liquid to the total volume of the liquid storage tank
  • the combustible gas processing device may further include a fourth controller connected with the liquid level gauge.
  • the fourth controller is configured to start the pump circuit to deliver the liquid in the liquid storage tank to the gasification burner when the ratio of the liquid volume detected by the liquid level gauge to the total volume of the liquid storage tank is greater than a predetermined ratio Carry out gasification combustion.
  • the predetermined ratio here may be 85%, but the embodiments according to the present disclosure are not limited thereto, for example, it may also be 50%, 60%, 70%, 90% and so on.
  • the part of the solid line connection represents the situation of the above-mentioned embodiment, that is, the first concentration analyzer is connected with the first controller, the second concentration analyzer is connected with the second controller, and the third concentration analyzer is connected with the second controller. It is connected with the third controller, and the liquid level gauge is connected with the fourth controller, and the corresponding control functions mentioned above are respectively realized through the first to fourth controllers.
  • the first concentration analyzer, the second concentration analyzer, the third concentration analyzer and the liquid level gauge are all connected to one controller.
  • the above-mentioned corresponding control functions are realized by one controller, for example, one controller includes a controller module capable of realizing the above-mentioned various functions.
  • the first to fourth controllers may refer to four separate controllers, or may refer to different functional modules of a single controller, or may refer to two controllers including the above functional modules.
  • controllers can be integrated into the first to fourth concentration analyzers and liquid level gauges respectively, or can be set separately from them and connected with wired or wireless communication, and the embodiment of the present disclosure has no special limitation on this.
  • the above-mentioned various controllers or controller modules may be implemented by software so as to be executed by various types of processors.
  • An identified module of executable code may, by way of example, comprise one or more physical or logical blocks of computer instructions which may, for example, be structured as an object, procedure, or function. Notwithstanding, the executable code of an identified module need not be physically located together, but may comprise distinct instructions stored on different physical locations which, when logically combined, constitute the module and carry out the stated purpose of the module .
  • a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs and across multiple memory devices.
  • operational data may be identified within modules, and may be implemented in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed in different locations (including on different storage devices), and may exist, at least in part, only as electronic signals on a system or network.
  • the hardware circuit includes conventional very large scale integration (VLSI) circuits or gate arrays as well as existing semiconductors such as logic chips, transistors, or other discrete components.
  • VLSI very large scale integration
  • a module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices, and the like.
  • the combustible gas treatment method includes: introducing the collected combustible gas mixture into the condenser through the condenser inlet; introducing the gas condensed through the condenser into the gas-liquid separator inlet
  • the gas-liquid separator performs gas-liquid separation; the liquid obtained after the gas-liquid separation is introduced into the liquid treatment part for processing, and the gas obtained after the gas-liquid separation is introduced into the membrane separator through the inlet of the membrane separator processing; the gas introduced into the membrane separator is divided into a first part and a second part after being processed by the membrane separator, the combustible gas content of the first part is greater than the gas content of the second part, and the first part is passed through The outlet of the first membrane separator enters the condenser, and the second part enters the exhaust gas treatment part through the outlet of the second membrane separator for treatment.
  • the combustible gas processing method further includes performing a combustible gas concentration detection on the first part divided after being processed by the membrane separator to obtain a first concentration value, when the first concentration value is greater than or equal to the first concentration threshold, it is determined that the membrane separator is working normally and the gas discharged from the outlet of the first membrane separator flows into the condenser; when the first concentration value is less than the first concentration When the threshold value is reached, it is determined that the membrane separator is working abnormally and troubleshooting is performed.
  • the collected combustible gas or the mixture of combustible gas and air enters the condenser through pipeline A, and then is separated from gas and liquid by a gas-liquid separator.
  • the liquefied part enters the liquid treatment part through pipeline B for liquid treatment, and the liquefied part enters the membrane separator through pipeline C, and then enters two processing paths of "gas treatment” and "exhaust gas treatment”: due to the membrane separator
  • the gas filter membrane has size selectivity, and is selectively filtered and enriched according to the size of the gas molecules.
  • the part of the enriched combustible gas enters the condenser again through the pipeline D, while the other part of the gas enters the exhaust gas treatment part through the pipeline E for treatment.
  • the gas passing through pipeline D is detected by the first concentration analyzer. If the concentration is greater than or equal to the first concentration threshold, it is determined that the membrane separator is working normally, and the gas in pipeline D continues to enter pipeline A and enters the system circulation again.
  • the gas passing through pipeline D is detected by the first concentration analyzer. If the concentration is lower than the first concentration threshold, it is determined that the membrane separator is working abnormally. Send an alarm message, display the fault code on the control screen, and send a short message to notify the operator to stop the machine for maintenance. If it stops, the entire cycle is terminated.
  • the combustible gas treatment method further includes detecting the combustible gas concentration of the second part divided after being processed by the membrane separator to obtain a second concentration value, when the second concentration value is greater than or equal to When the second concentration threshold is reached, it is determined that the membrane separator is working abnormally and fault processing is performed; when the second concentration value is less than the second concentration threshold, it is determined that the membrane separator is working normally and the second The gas discharged from the outlet of the membrane separator flows into the waste gas treatment part.
  • the gas in pipeline E is detected by the second concentration analyzer. If the concentration is greater than or equal to the second concentration threshold, it is determined that the membrane separator is working abnormally. After the system detects this signal, it will perform a self-diagnosis The module starts to work, automatically finds the source of the fault, and sends out an alarm message, displays the fault code on the control screen, and sends a text message to notify the operator to stop the machine for maintenance. If it stops, the entire cycle is terminated.
  • the gas in pipeline E is detected by the second concentration analyzer. If the concentration is lower than the second concentration threshold, it is determined that the membrane separation is working normally, and the gas enters the adsorption box for adsorption.
  • the waste gas treatment part processing the introduced gas includes: adsorbing the gas entering the waste gas treatment part through an adsorption box to adsorb at least part of the combustible gas, and discharging the unadsorbed gas; The adsorbed gas is sucked out by a vacuum pump and introduced into the condenser for circulation.
  • the gas discharged from the outlet of the second membrane separator enters the adsorption box through the pipeline E, and the adsorption box is adsorbed by at least part of the combustible gas, and the gas that is not adsorbed is discharged from the outlet of the adsorption box, and passed through the pipeline E via The fan discharges to the outside world. Due to the limited adsorption capacity of the adsorption box, the adsorption capacity will be weakened after absorbing a certain amount of combustible gas molecules. The combustible gas is sucked out by the vacuum pump, and enters the condenser again through the pipeline G for circulation treatment.
  • the combustible gas treatment method further includes detecting the combustible gas concentration of the unadsorbed gas discharged from the adsorption box to obtain a third concentration value, and when the third concentration value is less than a third concentration threshold value, Determine that the adsorption box is working normally and discharge the gas discharged from the adsorption box to the outside; when the third concentration value is greater than or equal to the third concentration threshold, determine that the adsorption box is working abnormally and perform fault handling .
  • the third concentration analyzer detects that the concentration of combustible gas in the pipeline F is less than the third concentration threshold, it is determined that the adsorption of the adsorption box is normal, and it is safely emptied under the action of the "fan";
  • the vacuum pump starts to work for the second predetermined time to suck out the combustible gas molecules in the adsorption box, pass through the pipeline G, and reach the pipeline A, so that the combustible gas enters the system circulation again.
  • the first predetermined time and the second predetermined time are determined according to the adsorption capacity of the adsorption box and the suction capacity of the vacuum pump, which are not particularly limited according to the embodiments of the present disclosure.
  • the first predetermined time may be several hours, and the second predetermined time may be several minutes to ten minutes or tens of minutes.
  • blower and the vacuum pump can work alternately, so that the delivery of gas in pipeline F and pipeline G can be carried out alternately.
  • the system determines that the adsorption box is abnormal.
  • the fault code is displayed on the control panel, and at the same time, a short message is sent to notify the operator to stop the machine for maintenance. If it stops, the entire cycle is terminated.
  • processing the liquid introduced into the liquid treatment unit includes: introducing the liquid into a gasification burner through a pump circuit to gasify and burn the liquid, and the gas generated after combustion is discharged to the outside.
  • the combustible gas processing method further includes storing the liquid in a liquid storage tank before introducing the liquid into the liquid part; detecting the liquid volume state of the liquid storage tank, when the liquid When the ratio of the volume to the total volume of the liquid storage tank is greater than a predetermined ratio, the pump circuit is activated to deliver the liquid in the liquid storage tank to the gasification burner for gasification combustion.
  • the liquefied part of combustible gas molecules enters the liquid storage tank through the B pipeline and enters the "liquid processing" module. meter detected. If the liquid level gauge detects that the capacity of the storage tank does not exceed the warning value, for example, the ratio of the liquid volume to the total volume of the liquid storage tank is greater than a predetermined ratio, the system is in a liquid storage working state, and the storage capacity of liquid hydrocarbons will continue to increase or If the liquid level gauge detects that the capacity of the storage tank exceeds the warning value, the system will judge that the liquid hydrocarbon storage tank needs to be released, and the system will automatically send an electronic signal to start the pump circuit, and the pump will start to transport the liquid hydrocarbon from the pipeline to the gas tank.
  • the gasification burner is gasified and automatically ignited for combustion. The carbon dioxide and water vapor produced after combustion are evacuated and disposed of safely.
  • the first concentration threshold, the second concentration threshold, the concentration threshold, the predetermined ratio, and fault handling involved in the embodiment of the combustible gas processing method can all refer to the description in the combustible gas processing device; in addition, in the combustible gas processing method
  • the technical effects reference may also be made to the corresponding description of the combustible gas treatment device, and for the sake of brevity, details are not repeated here.
  • each component of the combustible gas treatment device actually forms a gas or liquid circulation channel
  • the terms "close to”, “far away from”, “between” and the like refer to the fact that each component is within
  • the positional relationship in the connected pipes that is, the positional relationship on the flow path of the collected gas, is not necessarily the placement positional relationship of each component.
  • "connection” is not limited to direct connection, but may be indirect connection.
  • the combustible gas treatment device or combustible gas treatment method according to the embodiments of the present disclosure may be applicable to the treatment of various combustible gases. For example, it can be applied to the treatment of hydrocarbon combustible gases.
  • Hydrocarbon gas refers to the general term for hydrocarbons containing carbon and hydrogen elements. It is a compound composed of carbon and hydrogen atoms, which mainly includes alkanes, cycloalkanes, alkenes, alkynes, and aromatics.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Incineration Of Waste (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un appareil et un procédé de traitement de gaz combustible. L'appareil de traitement de gaz combustible comprend : un condenseur, un séparateur gaz-liquide, une partie de traitement de liquide, un séparateur à membrane et une partie de traitement de gaz résiduaire. Une sortie du condenseur est reliée à une entrée du séparateur gaz-liquide, une sortie de liquide du séparateur gaz-liquide est reliée à la partie de traitement de liquide, une sortie de gaz du séparateur gaz-liquide est reliée à une entrée du séparateur à membrane, une première sortie du séparateur à membrane est reliée à une entrée du condenseur, une seconde sortie du séparateur à membrane est reliée à la partie de traitement de gaz résiduaire, et un premier analyseur de concentration est connecté entre la première sortie du séparateur à membrane et l'entrée du condenseur ; un premier dispositif de commande est relié au premier analyseur de concentration, et le premier dispositif de commande est configuré pour : lorsque la concentration du gaz combustible mesurée par le premier analyseur de concentration est supérieure ou égale à un premier seuil de concentration, déterminer que le séparateur à membrane fonctionne normalement et amener le gaz évacué de la première sortie du séparateur à membrane à s'écouler dans le condenseur. L'appareil de traitement de gaz combustible sépare le gaz mixte de gaz combustible et d'air au moyen d'une conversion gaz-liquide en deux phases, effectue séparément le traitement, et renvoie des informations au moyen d'une mesure de concentration, ce qui permet d'assurer que le procédé de traitement est réalisé de manière sûre et efficace.
PCT/CN2022/070061 2021-11-17 2022-01-04 Appareil et procédé de traitement de gaz combustible WO2023087515A1 (fr)

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CN201692748U (zh) * 2010-06-04 2011-01-05 大连欧科膜技术工程有限公司 有机气体的排放控制与回收装置
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